662 lines
		
	
	
		
			23 KiB
		
	
	
	
		
			C++
		
	
	
	
			
		
		
	
	
			662 lines
		
	
	
		
			23 KiB
		
	
	
	
		
			C++
		
	
	
	
//===-- X86AsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly --------===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains a printer that converts from our internal representation
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// of machine-dependent LLVM code to X86 machine code.
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//
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//===----------------------------------------------------------------------===//
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#include "X86AsmPrinter.h"
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#include "InstPrinter/X86ATTInstPrinter.h"
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#include "MCTargetDesc/X86BaseInfo.h"
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#include "X86InstrInfo.h"
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#include "X86MachineFunctionInfo.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/CodeGen/MachineModuleInfoImpls.h"
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#include "llvm/CodeGen/MachineValueType.h"
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#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Mangler.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Type.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/TargetRegistry.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Primitive Helper Functions.
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//===----------------------------------------------------------------------===//
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/// runOnMachineFunction - Emit the function body.
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///
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bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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  Subtarget = &MF.getSubtarget<X86Subtarget>();
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  SMShadowTracker.startFunction(MF);
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  CodeEmitter.reset(TM.getTarget().createMCCodeEmitter(
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      *MF.getSubtarget().getInstrInfo(), *MF.getSubtarget().getRegisterInfo(),
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      MF.getContext()));
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  SetupMachineFunction(MF);
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  if (Subtarget->isTargetCOFF()) {
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    bool Local = MF.getFunction()->hasLocalLinkage();
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    OutStreamer->BeginCOFFSymbolDef(CurrentFnSym);
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    OutStreamer->EmitCOFFSymbolStorageClass(
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        Local ? COFF::IMAGE_SYM_CLASS_STATIC : COFF::IMAGE_SYM_CLASS_EXTERNAL);
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    OutStreamer->EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
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                                               << COFF::SCT_COMPLEX_TYPE_SHIFT);
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    OutStreamer->EndCOFFSymbolDef();
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  }
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  // Emit the rest of the function body.
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  EmitFunctionBody();
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  // Emit the XRay table for this function.
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  emitXRayTable();
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  // We didn't modify anything.
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  return false;
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}
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/// printSymbolOperand - Print a raw symbol reference operand.  This handles
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/// jump tables, constant pools, global address and external symbols, all of
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/// which print to a label with various suffixes for relocation types etc.
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static void printSymbolOperand(X86AsmPrinter &P, const MachineOperand &MO,
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                               raw_ostream &O) {
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  switch (MO.getType()) {
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  default: llvm_unreachable("unknown symbol type!");
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  case MachineOperand::MO_ConstantPoolIndex:
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    P.GetCPISymbol(MO.getIndex())->print(O, P.MAI);
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    P.printOffset(MO.getOffset(), O);
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    break;
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  case MachineOperand::MO_GlobalAddress: {
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    const GlobalValue *GV = MO.getGlobal();
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    MCSymbol *GVSym;
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    if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
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        MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE)
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      GVSym = P.getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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    else
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      GVSym = P.getSymbol(GV);
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    // Handle dllimport linkage.
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    if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
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      GVSym =
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          P.OutContext.getOrCreateSymbol(Twine("__imp_") + GVSym->getName());
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    if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
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        MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
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      MCSymbol *Sym = P.getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
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      MachineModuleInfoImpl::StubValueTy &StubSym =
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          P.MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(Sym);
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      if (!StubSym.getPointer())
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        StubSym = MachineModuleInfoImpl::
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          StubValueTy(P.getSymbol(GV), !GV->hasInternalLinkage());
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    }
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    // If the name begins with a dollar-sign, enclose it in parens.  We do this
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    // to avoid having it look like an integer immediate to the assembler.
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    if (GVSym->getName()[0] != '$')
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      GVSym->print(O, P.MAI);
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    else {
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      O << '(';
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      GVSym->print(O, P.MAI);
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      O << ')';
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    }
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    P.printOffset(MO.getOffset(), O);
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    break;
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  }
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  }
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  switch (MO.getTargetFlags()) {
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  default:
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    llvm_unreachable("Unknown target flag on GV operand");
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  case X86II::MO_NO_FLAG:    // No flag.
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    break;
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  case X86II::MO_DARWIN_NONLAZY:
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  case X86II::MO_DLLIMPORT:
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    // These affect the name of the symbol, not any suffix.
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    break;
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  case X86II::MO_GOT_ABSOLUTE_ADDRESS:
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    O << " + [.-";
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    P.MF->getPICBaseSymbol()->print(O, P.MAI);
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    O << ']';
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    break;
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  case X86II::MO_PIC_BASE_OFFSET:
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  case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
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    O << '-';
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    P.MF->getPICBaseSymbol()->print(O, P.MAI);
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    break;
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  case X86II::MO_TLSGD:     O << "@TLSGD";     break;
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  case X86II::MO_TLSLD:     O << "@TLSLD";     break;
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  case X86II::MO_TLSLDM:    O << "@TLSLDM";    break;
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  case X86II::MO_GOTTPOFF:  O << "@GOTTPOFF";  break;
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  case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break;
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  case X86II::MO_TPOFF:     O << "@TPOFF";     break;
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  case X86II::MO_DTPOFF:    O << "@DTPOFF";    break;
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  case X86II::MO_NTPOFF:    O << "@NTPOFF";    break;
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  case X86II::MO_GOTNTPOFF: O << "@GOTNTPOFF"; break;
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  case X86II::MO_GOTPCREL:  O << "@GOTPCREL";  break;
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  case X86II::MO_GOT:       O << "@GOT";       break;
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  case X86II::MO_GOTOFF:    O << "@GOTOFF";    break;
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  case X86II::MO_PLT:       O << "@PLT";       break;
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  case X86II::MO_TLVP:      O << "@TLVP";      break;
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  case X86II::MO_TLVP_PIC_BASE:
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    O << "@TLVP" << '-';
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    P.MF->getPICBaseSymbol()->print(O, P.MAI);
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    break;
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  case X86II::MO_SECREL:    O << "@SECREL32";  break;
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  }
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}
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static void printOperand(X86AsmPrinter &P, const MachineInstr *MI,
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                         unsigned OpNo, raw_ostream &O,
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                         const char *Modifier = nullptr, unsigned AsmVariant = 0);
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/// printPCRelImm - This is used to print an immediate value that ends up
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/// being encoded as a pc-relative value.  These print slightly differently, for
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/// example, a $ is not emitted.
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static void printPCRelImm(X86AsmPrinter &P, const MachineInstr *MI,
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                          unsigned OpNo, raw_ostream &O) {
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  const MachineOperand &MO = MI->getOperand(OpNo);
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  switch (MO.getType()) {
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  default: llvm_unreachable("Unknown pcrel immediate operand");
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  case MachineOperand::MO_Register:
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    // pc-relativeness was handled when computing the value in the reg.
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    printOperand(P, MI, OpNo, O);
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    return;
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  case MachineOperand::MO_Immediate:
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    O << MO.getImm();
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    return;
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  case MachineOperand::MO_GlobalAddress:
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    printSymbolOperand(P, MO, O);
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    return;
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  }
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}
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static void printOperand(X86AsmPrinter &P, const MachineInstr *MI,
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                         unsigned OpNo, raw_ostream &O, const char *Modifier,
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                         unsigned AsmVariant) {
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  const MachineOperand &MO = MI->getOperand(OpNo);
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  switch (MO.getType()) {
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  default: llvm_unreachable("unknown operand type!");
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  case MachineOperand::MO_Register: {
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    // FIXME: Enumerating AsmVariant, so we can remove magic number.
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    if (AsmVariant == 0) O << '%';
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    unsigned Reg = MO.getReg();
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    if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
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      unsigned Size = (strcmp(Modifier+6,"64") == 0) ? 64 :
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                      (strcmp(Modifier+6,"32") == 0) ? 32 :
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                      (strcmp(Modifier+6,"16") == 0) ? 16 : 8;
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      Reg = getX86SubSuperRegister(Reg, Size);
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    }
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    O << X86ATTInstPrinter::getRegisterName(Reg);
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    return;
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  }
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  case MachineOperand::MO_Immediate:
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    if (AsmVariant == 0) O << '$';
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    O << MO.getImm();
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    return;
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  case MachineOperand::MO_GlobalAddress: {
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    if (AsmVariant == 0) O << '$';
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    printSymbolOperand(P, MO, O);
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    break;
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  }
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  }
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}
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static void printLeaMemReference(X86AsmPrinter &P, const MachineInstr *MI,
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                                 unsigned Op, raw_ostream &O,
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                                 const char *Modifier = nullptr) {
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  const MachineOperand &BaseReg  = MI->getOperand(Op+X86::AddrBaseReg);
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  const MachineOperand &IndexReg = MI->getOperand(Op+X86::AddrIndexReg);
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  const MachineOperand &DispSpec = MI->getOperand(Op+X86::AddrDisp);
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  // If we really don't want to print out (rip), don't.
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  bool HasBaseReg = BaseReg.getReg() != 0;
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  if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") &&
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      BaseReg.getReg() == X86::RIP)
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    HasBaseReg = false;
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  // HasParenPart - True if we will print out the () part of the mem ref.
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  bool HasParenPart = IndexReg.getReg() || HasBaseReg;
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  switch (DispSpec.getType()) {
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  default:
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    llvm_unreachable("unknown operand type!");
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  case MachineOperand::MO_Immediate: {
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    int DispVal = DispSpec.getImm();
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    if (DispVal || !HasParenPart)
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      O << DispVal;
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    break;
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  }
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  case MachineOperand::MO_GlobalAddress:
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  case MachineOperand::MO_ConstantPoolIndex:
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    printSymbolOperand(P, DispSpec, O);
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  }
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  if (Modifier && strcmp(Modifier, "H") == 0)
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    O << "+8";
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  if (HasParenPart) {
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    assert(IndexReg.getReg() != X86::ESP &&
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           "X86 doesn't allow scaling by ESP");
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    O << '(';
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    if (HasBaseReg)
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      printOperand(P, MI, Op+X86::AddrBaseReg, O, Modifier);
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    if (IndexReg.getReg()) {
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      O << ',';
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      printOperand(P, MI, Op+X86::AddrIndexReg, O, Modifier);
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      unsigned ScaleVal = MI->getOperand(Op+X86::AddrScaleAmt).getImm();
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      if (ScaleVal != 1)
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        O << ',' << ScaleVal;
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    }
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    O << ')';
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  }
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}
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static void printMemReference(X86AsmPrinter &P, const MachineInstr *MI,
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                              unsigned Op, raw_ostream &O,
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                              const char *Modifier = nullptr) {
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  assert(isMem(*MI, Op) && "Invalid memory reference!");
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  const MachineOperand &Segment = MI->getOperand(Op+X86::AddrSegmentReg);
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  if (Segment.getReg()) {
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    printOperand(P, MI, Op+X86::AddrSegmentReg, O, Modifier);
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    O << ':';
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  }
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  printLeaMemReference(P, MI, Op, O, Modifier);
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}
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static void printIntelMemReference(X86AsmPrinter &P, const MachineInstr *MI,
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                                   unsigned Op, raw_ostream &O,
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                                   const char *Modifier = nullptr,
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                                   unsigned AsmVariant = 1) {
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  const MachineOperand &BaseReg  = MI->getOperand(Op+X86::AddrBaseReg);
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  unsigned ScaleVal = MI->getOperand(Op+X86::AddrScaleAmt).getImm();
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  const MachineOperand &IndexReg = MI->getOperand(Op+X86::AddrIndexReg);
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  const MachineOperand &DispSpec = MI->getOperand(Op+X86::AddrDisp);
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  const MachineOperand &SegReg   = MI->getOperand(Op+X86::AddrSegmentReg);
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  // If this has a segment register, print it.
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  if (SegReg.getReg()) {
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    printOperand(P, MI, Op+X86::AddrSegmentReg, O, Modifier, AsmVariant);
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    O << ':';
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  }
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  O << '[';
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  bool NeedPlus = false;
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  if (BaseReg.getReg()) {
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    printOperand(P, MI, Op+X86::AddrBaseReg, O, Modifier, AsmVariant);
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    NeedPlus = true;
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  }
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  if (IndexReg.getReg()) {
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    if (NeedPlus) O << " + ";
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    if (ScaleVal != 1)
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      O << ScaleVal << '*';
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    printOperand(P, MI, Op+X86::AddrIndexReg, O, Modifier, AsmVariant);
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    NeedPlus = true;
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  }
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  if (!DispSpec.isImm()) {
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    if (NeedPlus) O << " + ";
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    printOperand(P, MI, Op+X86::AddrDisp, O, Modifier, AsmVariant);
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  } else {
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    int64_t DispVal = DispSpec.getImm();
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    if (DispVal || (!IndexReg.getReg() && !BaseReg.getReg())) {
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      if (NeedPlus) {
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        if (DispVal > 0)
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          O << " + ";
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        else {
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          O << " - ";
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          DispVal = -DispVal;
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        }
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      }
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      O << DispVal;
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    }
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  }
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  O << ']';
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}
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static bool printAsmMRegister(X86AsmPrinter &P, const MachineOperand &MO,
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                              char Mode, raw_ostream &O) {
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  unsigned Reg = MO.getReg();
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  switch (Mode) {
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  default: return true;  // Unknown mode.
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  case 'b': // Print QImode register
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    Reg = getX86SubSuperRegister(Reg, 8);
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    break;
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  case 'h': // Print QImode high register
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    Reg = getX86SubSuperRegister(Reg, 8, true);
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    break;
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  case 'w': // Print HImode register
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    Reg = getX86SubSuperRegister(Reg, 16);
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    break;
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  case 'k': // Print SImode register
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    Reg = getX86SubSuperRegister(Reg, 32);
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    break;
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  case 'q':
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    // Print 64-bit register names if 64-bit integer registers are available.
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    // Otherwise, print 32-bit register names.
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    Reg = getX86SubSuperRegister(Reg, P.getSubtarget().is64Bit() ? 64 : 32);
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    break;
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  }
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  O << '%' << X86ATTInstPrinter::getRegisterName(Reg);
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  return false;
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}
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/// PrintAsmOperand - Print out an operand for an inline asm expression.
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///
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bool X86AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
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                                    unsigned AsmVariant,
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                                    const char *ExtraCode, raw_ostream &O) {
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  // Does this asm operand have a single letter operand modifier?
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  if (ExtraCode && ExtraCode[0]) {
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    if (ExtraCode[1] != 0) return true; // Unknown modifier.
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    const MachineOperand &MO = MI->getOperand(OpNo);
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    switch (ExtraCode[0]) {
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    default:
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      // See if this is a generic print operand
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      return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
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    case 'a': // This is an address.  Currently only 'i' and 'r' are expected.
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      switch (MO.getType()) {
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      default:
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        return true;
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      case MachineOperand::MO_Immediate:
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        O << MO.getImm();
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        return false;
 | 
						|
      case MachineOperand::MO_ConstantPoolIndex:
 | 
						|
      case MachineOperand::MO_JumpTableIndex:
 | 
						|
      case MachineOperand::MO_ExternalSymbol:
 | 
						|
        llvm_unreachable("unexpected operand type!");
 | 
						|
      case MachineOperand::MO_GlobalAddress:
 | 
						|
        printSymbolOperand(*this, MO, O);
 | 
						|
        if (Subtarget->isPICStyleRIPRel())
 | 
						|
          O << "(%rip)";
 | 
						|
        return false;
 | 
						|
      case MachineOperand::MO_Register:
 | 
						|
        O << '(';
 | 
						|
        printOperand(*this, MI, OpNo, O);
 | 
						|
        O << ')';
 | 
						|
        return false;
 | 
						|
      }
 | 
						|
 | 
						|
    case 'c': // Don't print "$" before a global var name or constant.
 | 
						|
      switch (MO.getType()) {
 | 
						|
      default:
 | 
						|
        printOperand(*this, MI, OpNo, O);
 | 
						|
        break;
 | 
						|
      case MachineOperand::MO_Immediate:
 | 
						|
        O << MO.getImm();
 | 
						|
        break;
 | 
						|
      case MachineOperand::MO_ConstantPoolIndex:
 | 
						|
      case MachineOperand::MO_JumpTableIndex:
 | 
						|
      case MachineOperand::MO_ExternalSymbol:
 | 
						|
        llvm_unreachable("unexpected operand type!");
 | 
						|
      case MachineOperand::MO_GlobalAddress:
 | 
						|
        printSymbolOperand(*this, MO, O);
 | 
						|
        break;
 | 
						|
      }
 | 
						|
      return false;
 | 
						|
 | 
						|
    case 'A': // Print '*' before a register (it must be a register)
 | 
						|
      if (MO.isReg()) {
 | 
						|
        O << '*';
 | 
						|
        printOperand(*this, MI, OpNo, O);
 | 
						|
        return false;
 | 
						|
      }
 | 
						|
      return true;
 | 
						|
 | 
						|
    case 'b': // Print QImode register
 | 
						|
    case 'h': // Print QImode high register
 | 
						|
    case 'w': // Print HImode register
 | 
						|
    case 'k': // Print SImode register
 | 
						|
    case 'q': // Print DImode register
 | 
						|
      if (MO.isReg())
 | 
						|
        return printAsmMRegister(*this, MO, ExtraCode[0], O);
 | 
						|
      printOperand(*this, MI, OpNo, O);
 | 
						|
      return false;
 | 
						|
 | 
						|
    case 'P': // This is the operand of a call, treat specially.
 | 
						|
      printPCRelImm(*this, MI, OpNo, O);
 | 
						|
      return false;
 | 
						|
 | 
						|
    case 'n':  // Negate the immediate or print a '-' before the operand.
 | 
						|
      // Note: this is a temporary solution. It should be handled target
 | 
						|
      // independently as part of the 'MC' work.
 | 
						|
      if (MO.isImm()) {
 | 
						|
        O << -MO.getImm();
 | 
						|
        return false;
 | 
						|
      }
 | 
						|
      O << '-';
 | 
						|
    }
 | 
						|
  }
 | 
						|
 | 
						|
  printOperand(*this, MI, OpNo, O, /*Modifier*/ nullptr, AsmVariant);
 | 
						|
  return false;
 | 
						|
}
 | 
						|
 | 
						|
bool X86AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
 | 
						|
                                          unsigned OpNo, unsigned AsmVariant,
 | 
						|
                                          const char *ExtraCode,
 | 
						|
                                          raw_ostream &O) {
 | 
						|
  if (AsmVariant) {
 | 
						|
    printIntelMemReference(*this, MI, OpNo, O);
 | 
						|
    return false;
 | 
						|
  }
 | 
						|
 | 
						|
  if (ExtraCode && ExtraCode[0]) {
 | 
						|
    if (ExtraCode[1] != 0) return true; // Unknown modifier.
 | 
						|
 | 
						|
    switch (ExtraCode[0]) {
 | 
						|
    default: return true;  // Unknown modifier.
 | 
						|
    case 'b': // Print QImode register
 | 
						|
    case 'h': // Print QImode high register
 | 
						|
    case 'w': // Print HImode register
 | 
						|
    case 'k': // Print SImode register
 | 
						|
    case 'q': // Print SImode register
 | 
						|
      // These only apply to registers, ignore on mem.
 | 
						|
      break;
 | 
						|
    case 'H':
 | 
						|
      printMemReference(*this, MI, OpNo, O, "H");
 | 
						|
      return false;
 | 
						|
    case 'P': // Don't print @PLT, but do print as memory.
 | 
						|
      printMemReference(*this, MI, OpNo, O, "no-rip");
 | 
						|
      return false;
 | 
						|
    }
 | 
						|
  }
 | 
						|
  printMemReference(*this, MI, OpNo, O);
 | 
						|
  return false;
 | 
						|
}
 | 
						|
 | 
						|
void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
 | 
						|
  const Triple &TT = TM.getTargetTriple();
 | 
						|
 | 
						|
  if (TT.isOSBinFormatMachO())
 | 
						|
    OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
 | 
						|
 | 
						|
  if (TT.isOSBinFormatCOFF()) {
 | 
						|
    // Emit an absolute @feat.00 symbol.  This appears to be some kind of
 | 
						|
    // compiler features bitfield read by link.exe.
 | 
						|
    if (TT.getArch() == Triple::x86) {
 | 
						|
      MCSymbol *S = MMI->getContext().getOrCreateSymbol(StringRef("@feat.00"));
 | 
						|
      OutStreamer->BeginCOFFSymbolDef(S);
 | 
						|
      OutStreamer->EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_STATIC);
 | 
						|
      OutStreamer->EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_NULL);
 | 
						|
      OutStreamer->EndCOFFSymbolDef();
 | 
						|
      // According to the PE-COFF spec, the LSB of this value marks the object
 | 
						|
      // for "registered SEH".  This means that all SEH handler entry points
 | 
						|
      // must be registered in .sxdata.  Use of any unregistered handlers will
 | 
						|
      // cause the process to terminate immediately.  LLVM does not know how to
 | 
						|
      // register any SEH handlers, so its object files should be safe.
 | 
						|
      OutStreamer->EmitSymbolAttribute(S, MCSA_Global);
 | 
						|
      OutStreamer->EmitAssignment(
 | 
						|
          S, MCConstantExpr::create(int64_t(1), MMI->getContext()));
 | 
						|
    }
 | 
						|
  }
 | 
						|
  OutStreamer->EmitSyntaxDirective();
 | 
						|
 | 
						|
  // If this is not inline asm and we're in 16-bit
 | 
						|
  // mode prefix assembly with .code16.
 | 
						|
  bool is16 = TT.getEnvironment() == Triple::CODE16;
 | 
						|
  if (M.getModuleInlineAsm().empty() && is16)
 | 
						|
    OutStreamer->EmitAssemblerFlag(MCAF_Code16);
 | 
						|
}
 | 
						|
 | 
						|
static void
 | 
						|
emitNonLazySymbolPointer(MCStreamer &OutStreamer, MCSymbol *StubLabel,
 | 
						|
                         MachineModuleInfoImpl::StubValueTy &MCSym) {
 | 
						|
  // L_foo$stub:
 | 
						|
  OutStreamer.EmitLabel(StubLabel);
 | 
						|
  //   .indirect_symbol _foo
 | 
						|
  OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol);
 | 
						|
 | 
						|
  if (MCSym.getInt())
 | 
						|
    // External to current translation unit.
 | 
						|
    OutStreamer.EmitIntValue(0, 4/*size*/);
 | 
						|
  else
 | 
						|
    // Internal to current translation unit.
 | 
						|
    //
 | 
						|
    // When we place the LSDA into the TEXT section, the type info
 | 
						|
    // pointers need to be indirect and pc-rel. We accomplish this by
 | 
						|
    // using NLPs; however, sometimes the types are local to the file.
 | 
						|
    // We need to fill in the value for the NLP in those cases.
 | 
						|
    OutStreamer.EmitValue(
 | 
						|
        MCSymbolRefExpr::create(MCSym.getPointer(), OutStreamer.getContext()),
 | 
						|
        4 /*size*/);
 | 
						|
}
 | 
						|
 | 
						|
MCSymbol *X86AsmPrinter::GetCPISymbol(unsigned CPID) const {
 | 
						|
  if (Subtarget->isTargetKnownWindowsMSVC()) {
 | 
						|
    const MachineConstantPoolEntry &CPE =
 | 
						|
        MF->getConstantPool()->getConstants()[CPID];
 | 
						|
    if (!CPE.isMachineConstantPoolEntry()) {
 | 
						|
      const DataLayout &DL = MF->getDataLayout();
 | 
						|
      SectionKind Kind = CPE.getSectionKind(&DL);
 | 
						|
      const Constant *C = CPE.Val.ConstVal;
 | 
						|
      unsigned Align = CPE.Alignment;
 | 
						|
      if (const MCSectionCOFF *S = dyn_cast<MCSectionCOFF>(
 | 
						|
              getObjFileLowering().getSectionForConstant(DL, Kind, C, Align))) {
 | 
						|
        if (MCSymbol *Sym = S->getCOMDATSymbol()) {
 | 
						|
          if (Sym->isUndefined())
 | 
						|
            OutStreamer->EmitSymbolAttribute(Sym, MCSA_Global);
 | 
						|
          return Sym;
 | 
						|
        }
 | 
						|
      }
 | 
						|
    }
 | 
						|
  }
 | 
						|
 | 
						|
  return AsmPrinter::GetCPISymbol(CPID);
 | 
						|
}
 | 
						|
 | 
						|
void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
 | 
						|
  const Triple &TT = TM.getTargetTriple();
 | 
						|
 | 
						|
  if (TT.isOSBinFormatMachO()) {
 | 
						|
    // All darwin targets use mach-o.
 | 
						|
    MachineModuleInfoMachO &MMIMacho =
 | 
						|
        MMI->getObjFileInfo<MachineModuleInfoMachO>();
 | 
						|
 | 
						|
    // Output stubs for dynamically-linked functions.
 | 
						|
    MachineModuleInfoMachO::SymbolListTy Stubs;
 | 
						|
 | 
						|
    // Output stubs for external and common global variables.
 | 
						|
    Stubs = MMIMacho.GetGVStubList();
 | 
						|
    if (!Stubs.empty()) {
 | 
						|
      MCSection *TheSection = OutContext.getMachOSection(
 | 
						|
          "__IMPORT", "__pointers", MachO::S_NON_LAZY_SYMBOL_POINTERS,
 | 
						|
          SectionKind::getMetadata());
 | 
						|
      OutStreamer->SwitchSection(TheSection);
 | 
						|
 | 
						|
      for (auto &Stub : Stubs)
 | 
						|
        emitNonLazySymbolPointer(*OutStreamer, Stub.first, Stub.second);
 | 
						|
 | 
						|
      Stubs.clear();
 | 
						|
      OutStreamer->AddBlankLine();
 | 
						|
    }
 | 
						|
 | 
						|
    SM.serializeToStackMapSection();
 | 
						|
    FM.serializeToFaultMapSection();
 | 
						|
 | 
						|
    // Funny Darwin hack: This flag tells the linker that no global symbols
 | 
						|
    // contain code that falls through to other global symbols (e.g. the obvious
 | 
						|
    // implementation of multiple entry points).  If this doesn't occur, the
 | 
						|
    // linker can safely perform dead code stripping.  Since LLVM never
 | 
						|
    // generates code that does this, it is always safe to set.
 | 
						|
    OutStreamer->EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
 | 
						|
  }
 | 
						|
 | 
						|
  if (TT.isKnownWindowsMSVCEnvironment() && MMI->usesVAFloatArgument()) {
 | 
						|
    StringRef SymbolName =
 | 
						|
        (TT.getArch() == Triple::x86_64) ? "_fltused" : "__fltused";
 | 
						|
    MCSymbol *S = MMI->getContext().getOrCreateSymbol(SymbolName);
 | 
						|
    OutStreamer->EmitSymbolAttribute(S, MCSA_Global);
 | 
						|
  }
 | 
						|
 | 
						|
  if (TT.isOSBinFormatCOFF()) {
 | 
						|
    const TargetLoweringObjectFileCOFF &TLOFCOFF =
 | 
						|
        static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
 | 
						|
 | 
						|
    std::string Flags;
 | 
						|
    raw_string_ostream FlagsOS(Flags);
 | 
						|
 | 
						|
    for (const auto &Function : M)
 | 
						|
      TLOFCOFF.emitLinkerFlagsForGlobal(FlagsOS, &Function);
 | 
						|
    for (const auto &Global : M.globals())
 | 
						|
      TLOFCOFF.emitLinkerFlagsForGlobal(FlagsOS, &Global);
 | 
						|
    for (const auto &Alias : M.aliases())
 | 
						|
      TLOFCOFF.emitLinkerFlagsForGlobal(FlagsOS, &Alias);
 | 
						|
 | 
						|
    FlagsOS.flush();
 | 
						|
 | 
						|
    // Output collected flags.
 | 
						|
    if (!Flags.empty()) {
 | 
						|
      OutStreamer->SwitchSection(TLOFCOFF.getDrectveSection());
 | 
						|
      OutStreamer->EmitBytes(Flags);
 | 
						|
    }
 | 
						|
 | 
						|
    SM.serializeToStackMapSection();
 | 
						|
  }
 | 
						|
 | 
						|
  if (TT.isOSBinFormatELF()) {
 | 
						|
    SM.serializeToStackMapSection();
 | 
						|
    FM.serializeToFaultMapSection();
 | 
						|
  }
 | 
						|
}
 | 
						|
 | 
						|
//===----------------------------------------------------------------------===//
 | 
						|
// Target Registry Stuff
 | 
						|
//===----------------------------------------------------------------------===//
 | 
						|
 | 
						|
// Force static initialization.
 | 
						|
extern "C" void LLVMInitializeX86AsmPrinter() {
 | 
						|
  RegisterAsmPrinter<X86AsmPrinter> X(getTheX86_32Target());
 | 
						|
  RegisterAsmPrinter<X86AsmPrinter> Y(getTheX86_64Target());
 | 
						|
}
 |